Don- See technical page for Phil Peters article on a Pertronix ignition set-up. I followed it for my 6-14 system. Take those points out and run them over with your car!(although I never had any problem with the Durant set-up, just my British car Lucas distributor)
Don- The tech people at Petronix are very helpful. Maybe get all the info ready for the six cylinder set-up and ask what it would take to use it on a four cylinder(maybe just change the trigger wheel?)Ross